Exhibit 99.1





                  Investor Contact:                  Media Contact:
                  Meredith Mendola                   Nicole Rowe
                  781-370-6151                       781-370-6369
                  mmendola@ptc.com                   nrowe@ptc.com


             PTC Reports Fourth Quarter and Fiscal Year 2006 Results

   - Company Delivers Full-Year Revenue Growth of 19%, License Revenue Growth
              of 26% and Non-GAAP Operating Income Growth of 29% -

NEEDHAM, Mass., November 1, 2006 - PTC (Nasdaq: PMTC), the Product Development
Company(R), today reported revenue of $245.5 million for the fourth quarter
ended September 30, 2006, up 26% from the same period last year. For fiscal year
2006, PTC reported total revenue of $854.9 million, up 19% from fiscal year
2005. Total license revenue for the fourth quarter of 2006 was $84.6 million,
up 39% from the same period last year. Total license revenue for fiscal year
2006 was $263.5 million, up 26% from fiscal year 2005. The results for the
fourth quarter of 2006 reflected continued acceleration in organic revenue
growth and the contribution of recently acquired Mathsoft.

"Fiscal 2006 was an exceptional year marked by customer success and strong
financial results," said C. Richard Harrison, president and chief executive
officer. "In particular, we delivered robust Desktop Solutions results, record
Enterprise Solutions revenue, and significant operating leverage. Our
performance is attributable to three key differentiators: our expanding solution
capability footprint, which includes Arbortext(R), Mathcad (R) and,for fiscal
2007, ITEDO (R) solutions, our single platform architecture, and a thorough
understanding of our customers' product development challenges."

GAAP operating income for the fourth quarter of 2006 was $34.2 million, compared
with $11.6 million in the year-ago period. GAAP net income for the fourth
quarter of 2006 was $28.1 million, or $0.24 per diluted share, compared with
GAAP net income of $17.3 million, or $0.15 per diluted share, in the year-ago
period. Our GAAP results for the fourth quarter and full fiscal year of 2006
include a $2.3 million charge for stock-based compensation expense resulting
from our review of historic stock option grants, which is now complete. Non-GAAP
operating income, which excludes stock-based compensation cost, amortization of
acquisition-related intangible assets, in-process research and development
write-offs associated with acquisitions, and restructuring charges, was $48.6
million, or 19.8% of total revenue for the fourth quarter of 2006, compared with
$27.8 million, or 14.2% of total revenue in the year-ago period. Non-GAAP net
income, which excludes the items excluded from non-GAAP operating income and the
related tax effect of these items, as well as one-time tax items, was $42.6
million for the fourth quarter of 2006, or $0.37 per diluted share, compared to
$24.6 million in the year-ago period, or $0.22 per diluted share.

GAAP operating income for fiscal year 2006 was $74.1 million compared with $85.8
million in fiscal year 2005. GAAP net income for fiscal year 2006 was $63.2
million, or $0.56 per diluted share, compared to $83.6 million, or $0.75 per
diluted share in fiscal year 2005. PTC adopted SFAS 123(R) in the fourth quarter
of fiscal year 2005 and, therefore, the full year GAAP results for the year-ago
period do not include the cost of stock-based compensation for the first nine
months of 2005 in accordance with SFAS 123(R). Non-GAAP operating income, which
excludes stock-based compensation cost, amortization of acquisition-related
intangible assets, in-process research and development write-offs associated
with acquisitions, and restructuring charges, was $132.8 million in 2006, or
15.5% of total revenue, compared with $103.0 million, or 14.3% of total revenue
in 2005. Non-GAAP net income, which excludes the items excluded from non-GAAP
operating income and the related tax effect of these items, as well as one-time
tax items, was $113.4 million for 2006, or $1.00 per diluted share, compared to
$87.4 million in the year-ago period, or $0.78 per diluted share. We have
provided a reconciliation between GAAP and non-GAAP results in the attached
financial tables.

Cash and cash equivalents were $183 million at the end of the fiscal year 2006,
up from $174 million at the end of the third quarter.

Fourth Quarter 2006 Revenue Metrics
PTC delivered the following results for the fourth quarter of fiscal 2006
compared to the same period last year:
  o Total revenue growth of 26%, driven by license revenue growth of 39%,
    training and consulting service revenue growth of 34%, and maintenance
    revenue growth of 12%. Fourth quarter revenue included two transactions in
    excess of $5 million each;
  o Desktop Solutions total revenue growth of 23% to $159.4 million, driven by
    license revenue growth of 38%, training and consulting service revenue
    growth of 33%, and maintenance revenue growth of 12%. License revenue growth
    reflects strong sales of Pro/ENGINEER (R) new seats, modules, and upgrades,
    in addition to the revenue attributable to recently acquired Mathsoft
    products;
  o Enterprise Solutions total revenue growth of 31% to a record $86.1 million,
    driven by license revenue growth of 40%, training and consulting service
    revenue growth of 34%, and maintenance revenue growth of 13%. License
    revenue reflects strong sales of multiple Windchill (R) solutions including
    Windchill PDMLink (R) and related modules, Windchill ProjectLink (TM), and
    our visualization software;
  o Total revenue from our reseller channel of $46.8 million, up 34%, reflecting
    success in the SMB market around the world;
  o Revenue growth across all major geographies: 38% growth in North America,
    21% growth in Europe, and 12% growth in Asia-Pacific. Asia-Pacific revenue
    growth reflects an 18% revenue decline in Japan, more than offset by a 53%
    increase in revenue in the Pacific Rim.

In the fourth quarter, PTC received orders from leading organizations, including
Alstom Power Hydro, ANDREAS STIHL AG & Co. KG, Dell Inc., Daihatsu Motor Co.,
LTD., Federal Mogul Corporation, Festo AG & Co. KG, Herman Miller, Inc.,
Ingersoll Rand, Kye Systems Corp., OKI Electric Industry Co., Ltd., Qingdao
Beihai Ship Building Heavy Ind. Co. Ltd., and Tontec International.

Fiscal Year 2006 Revenue Metrics
PTC delivered the following results for fiscal 2006 compared to fiscal 2005:
  o Total revenue growth of 19%, driven by license revenue growth of 26%,
    training and consulting service revenue growth of 31%, and maintenance
    revenue growth of 8%;
  o Desktop Solutions total revenue growth of 12%, driven by license revenue
    growth of 20%, training and consulting service revenue growth of 17%, and
    maintenance revenue growth of 6%;
  o Enterprise Solutions total revenue growth of 35%, driven by license revenue
    growth of 36%, training and consulting service revenue growth of 43%, and
    maintenance revenue growth of 21%;
  o Total revenue from our reseller channel of $171.5 million, up 24%;
  o Revenue growth across all major geographies: 33% growth in North America,
    13% growth in Europe, and 6% growth in Asia-Pacific. Asia-Pacific revenue
    growth reflects a 14% revenue decline in Japan for fiscal year 2006, offset
    by a 34% increase in revenue in the Pacific Rim.

"We plan to drive continued revenue and earnings growth throughout 2007," said
Harrison. "Our market continues to grow, and our own growth exceeds that of the
market. We will continue to execute our strategy to help our customers solve
their product development challenges, while at the same time making continued
improvements to our worldwide distribution and service business models."







First Quarter and Fiscal Year 2007 Financial Outlook
PTC recently announced the acquisition of ITEDO Software, a provider of leading
technical illustration software. ITEDO's revenue for the past year was
approximately $5 million. PTC expects the acquisition to be slightly dilutive to
GAAP net income for fiscal 2007 due to the incremental amortization expense.
However, PTC expects the acquisition to have a neutral effect on non-GAAP net
income. Reflecting this acquisition, PTC has updated its targets for fiscal
2007.

PTC's revenue forecast for the first quarter of fiscal 2007 is between $215
million and $220 million. On a GAAP basis, first quarter total costs and
expenses are expected to be between $200 million and $203 million, and earnings
per share are expected to be between $0.09 and $0.11. Total non-GAAP first
quarter operating costs and expenses are expected to be between $187 million and
$190 million. The Company expects non-GAAP first quarter earnings per share to
be between $0.19 and $0.21. These non-GAAP operating cost and earnings
expectations exclude the following first quarter estimated expenses and their
tax effects:
  o Approximately $10 million of expense related to stock-based compensation
  o Approximately $3 million of acquisition-related amortization expense

For the fiscal year ending September 30, 2007, PTC expects revenue to be about
$945 million. On a GAAP basis, fiscal year 2007 total costs and expenses are
expected to be approximately $834 million, and earnings per share are expected
to be between $0.70 and $0.75. Total non-GAAP operating costs and expenses are
expected to be approximately $780 million. The Company expects non-GAAP earnings
per share to be between $1.15 and $1.20 for the fiscal year. These non-GAAP
earnings expectations exclude the following full-year estimated items and their
tax effects:
  o Approximately $40 million of expense related to stock-based compensation
  o Approximately $14 million of acquisition-related amortization expense

Important Information about Non-GAAP References
References by PTC to non-GAAP operating costs and non-GAAP earnings per share
refer to costs and expenses or earnings per share excluding stock-based
compensation cost, amortization of acquisition-related intangible assets,
in-process research and development write-offs associated with acquisitions,
restructuring charges, and their related tax effects, as well one-time tax
items, if any. GAAP requires that these costs and charges be included in costs
and expenses and accordingly used to determine operating income (loss) and
earnings per share. PTC's management uses non-GAAP operating costs, and
associated non-GAAP net income (which is the basis for non-GAAP earnings per
share) to make operational and investment decisions, and PTC believes that they
are among several useful measures for an enhanced understanding of our operating
results for a number of reasons.

First, excluding the stock-based compensation cost from GAAP operating income
enables management and investors to perform a meaningful comparison of
PTC's operating results to prior periods. In periods prior to the fourth quarter
of fiscal 2005, PTC's GAAP financial results reflected minimal stock-based
compensation expense because the value of stock-based awards was determined
using a method other than as prescribed in SFAS 123(R); whereas, upon adoption
of SFAS 123(R), stock-based compensation expense is now determined using a fair
value method and such expenses are now distributed among the functional expense
line items in the GAAP presentation. Second, although PTC undertakes analyses to
ensure that its stock-based compensation grants are in line with peer companies
and do not unduly dilute shareholders, PTC allocates these grants and measures
them at the corporate level. Management excludes their financial statement
effect when planning or measuring the periodic financial performance of PTC's
functional organizations since they are episodic in nature and unrelated to our
core operating metrics.  Likewise, we believe that excluding items such as
in-process research and development write-offs and amortization of intangible
assets associated with acquisitions, or restructuring charges that are not
directly attributable to our ongoing operations and that do not generally
fluctuate in correlation with periodic performance, provides investors with
information that helps to compare period-over-period operating performance by
highlighting the effect of acquisitions or restructuring activities on our
results of operations. In addition, PTC's management excludes the financial
statement effect of these items in creating operating budgets for PTC's
functional business units and in evaluating and compensating employees due to
the fact that it is difficult to forecast these expenses. Lastly, we believe
that providing non-GAAP earnings per share affords investors a view of earnings
that may be more easily compared to peer companies and enables investors to
consider PTC's earnings on both a GAAP and non-GAAP basis in periods when PTC is
engaged in acquisition activities or undertaking non-recurring activities.

PTC believes these non-GAAP measures will aid investors' overall understanding
of PTC's results by providing a higher degree of transparency for certain
expenses, and providing a level of disclosure that will help investors
understand how PTC plans and measures its own business. However, non-GAAP net
income (loss) should be construed neither as an alternative to GAAP net income
(loss) or earnings (loss) per share as an indicator of our operating performance
nor as a substitute for cash flow from operations as a measure of liquidity
because the items excluded from the non-GAAP measures often have a material
impact on PTC's results of operations. Therefore, management uses, and investors
should use, non-GAAP measures in conjunction with our reported GAAP results.

Earnings Call Webcast
PTC will provide detailed financial information and an outlook update on its
fourth quarter and fiscal year 2006 results conference call and live webcast
on November 1, 2006 at 10 a.m.ET. This earnings press release and accompanying
financial and operating statistics will be accessible prior to the conference
call and webcast on PTC's web site at www.ptc.com/for/investors.htm. In
addition, the live webcast may be accessed at the same Web address. To access
the live call, please dial 888-566-8560 (in the U.S.) or +1-517-623-4768
(international). Please use passcode PTC. A replay of the call will be available
until 5:00 p.m. ET on November 6, 2006. To access the replay via webcast, please
visit www.ptc.com/for/investors.htm. To access the replay by phone, please dial
203-369-3183.

PTC's unaudited consolidated statements of operations, the unaudited condensed
consolidated balance sheets, and the unaudited condensed consolidated
statements of cash flows for the fourth quarter and fiscal year 2006 are
attached.

About PTC
PTC (Nasdaq: PMTC) provides leading product lifecycle management (PLM), content
management and dynamic publishing solutions to more than 40,000 companies
worldwide. PTC customers include the world's most innovative companies in
manufacturing, publishing, services, government and life sciences industries.
PTC is included in the S&P 500 and Russell 2000 indices. For more information on
PTC, please visit http://www.ptc.com.

Statements in this news release that are not historical facts, including
statements about our confidence and strategies and our expectations about
revenue, results of operations, market growth and market acceptance of our
products, are forward-looking statements that involve risks and uncertainties
that could cause actual results to differ materially from those projected. Those
risks and uncertainties include the following: we may be unable to achieve
revenue and earnings growth at recent rates; the market for our products and
market adoption of our products may not continue to grow at recent rates; our
recent acquisitions may not generate the revenue we expect; as well as other
risks and uncertainties detailed from time to time in reports we file with the
Securities and Exchange Commission, including our most recent reports on Forms
10-K and 10-Q.

PTC, The Product Development Company, Windchill, Arbortext, Mathsoft, ITEDO, and
all PTC product names and logos are trademarks or registered trademarks of
Parametric Technology Corporation or its subsidiaries in the United States and
in other countries. All other companies and products referenced herein have
trademarks or registered trademarks of their respective holders.











                        PARAMETRIC TECHNOLOGY CORPORATION
                   UNAUDITED CONSOLIDATED STATEMENTS OF INCOME
                      (in thousands, except per share data)

                            Three Months Ended              Year Ended
                        --------------------------   --------------------------
                        September 30, September 30,  September 30, September 30,
                             2006            2005         2006           2005
                        ------------  ------------   ------------  ------------
Revenue:
 License                   $  84,608     $  60,862      $ 263,460     $ 209,717
 Service                     160,894       134,230        591,458       511,002
                            ---------     ---------      ---------     ---------
Total revenue                245,502       195,092        854,918       720,719
                            ---------     ---------      ---------     ---------

Costs and expenses:

 Cost of license revenue(2)    4,031         3,499         12,218         8,444
 Cost of service revenue(2)   69,473        55,387        257,415       199,798
 Sales and marketing(2)       76,349        69,106        274,287       243,758
 Research and development(2)  39,861        35,392        147,338       118,267
 General and administrative(2)19,778        19,749         75,484        63,605
 Amortization of acquired
  intangible assets            1,782           968          6,074         1,638
 In-process research and
  development                    -             730          2,100           730
 Restructuring charge, net       -          (1,307)         5,947        (1,307)
                            ---------     ---------      ---------     ---------
Total costs and expenses     211,274       183,524        780,863       634,933
                            ---------     ---------      ---------     ---------

Operating income              34,228        11,568         74,055        85,786
 Other income, net               956         1,300          3,699         5,526
                            ---------     ---------      ---------     ---------
Income before income taxes    35,184        12,868         77,754        91,312
 Provision for (benefit from)
  income taxes                 7,132        (4,407)        14,559         7,720
                            ---------     ---------      ---------     ---------
Net income                 $  28,052     $  17,275      $  63,195     $  83,592
                            =========     =========      =========     =========
Earnings per share:(1)
  Basic                    $    0.25     $    0.16      $    0.58     $    0.77
Weighted average shares
   outstanding               110,224       108,928        109,849       108,536
  Diluted                  $    0.24     $    0.15      $    0.56     $    0.75
Weighted average shares
   outstanding               114,581       112,267        113,382       111,981

(1) A two-for-five reverse stock split of our common stock became effective on
    February 28, 2006. All earnings per share and weighted-average share amounts
    are presented on a post-split basis.
(2) Effective July 3, 2005, PTC adopted SFAS 123(R), "Share-Based Payment".
    Accordingly, for three months and fiscal year ended September 30, 2006, and
    three months ended September 30, 2005, stock-based compensation was
    accounted under SFAS 123(R) while, for the three and nine months ended July
    2, 2005, stock-based compensation was accounted under APB No. 25,
    "Accounting for Stock Issued to Employees". Our results for the fourth
    quarter and full fiscal year of 2006 include a $2.3 million charge for
    stock-based compensation expense resulting from our review of historic stock
    option grants, which is now complete. The amounts in the tables above
    include stock-based compensation as follows:

                            Three Months Ended              Year Ended
                        --------------------------    --------------------------
                        September 30, September 30,  September 30, September 30,
                             2006         2005           2006          2005
                        ------------  ------------   ------------   ------------
 Cost of license revenue   $     26      $     61       $    122      $      61
 Cost of service revenue      1,881         2,644          7,711          2,644
 Sales and marketing          3,833         5,113         11,074          5,113
 Research and development     2,364         3,468          9,017          3,722
 General and administrative   3,110         3,925         12,563          3,925
                        ------------  ------------   ------------   ------------
Total stock-based
  compensation            $  11,214      $ 15,211       $ 40,487      $  15,465
                        ============  ============   ============   ============



                        PARAMETRIC TECHNOLOGY CORPORATION
           NON-GAAP FINANCIAL MEASURES AND RECONCILIATIONS (UNAUDITED)
                      (in thousands, except per share data)

                            Three Months Ended              Year Ended
                        --------------------------   --------------------------
                        September 30, September 30,  September 30, September 30,
                            2006          2005           2006          2005
                        ------------  ------------   ------------   ------------
GAAP operating income     $  34,228      $ 11,568       $ 74,055      $  85,786
 Stock-based compensation    11,214        15,211         40,487         15,465
 Amortization of acquired
  intangible assets included
  in cost of license revenue  1,296           619          3,945            646
 Amortization of acquired
  intangible assets included
  in cost of service revenue     66             -            235              -
 Amortization of acquired
  intangible assets           1,782           968          6,074          1,638
 In-process research and
  development                     -           730          2,100            730
 Restructuring charge, net        -        (1,307)         5,947         (1,307)
                        ------------  ------------   ------------  -------------
Non-GAAP operating
  income                  $  48,586      $ 27,789       $132,843      $ 102,958
                        ============  ============   ============ ==============

GAAP net income           $  28,052      $ 17,275       $ 63,195      $  83,592
 Stock-based compensation    11,214        15,211         40,487         15,465
 Amortization of acquired
  intangible assets included
  in cost of license revenue  1,296           619          3,945            646
 Amortization of acquired
  intangible assets included
  in cost of service revenue     66             -            235              -
 Amortization of acquired
  intangible assets           1,782           968          6,074          1,638
 In-process research and
  development                     -           730          2,100            730
 Restructuring charge, net        -        (1,307)         5,947         (1,307)
 Income tax adjustments(3)      156        (8,928)        (8,588)       (13,344)
                        ---------------------------  ---------------------------
Non-GAAP net income       $  42,566      $ 24,568       $113,395      $  87,420
                        ===========================  ===========================

GAAP diluted earnings
  per share               $    0.24      $   0.15       $   0.56      $    0.75
 Stock-based compensation      0.10          0.13           0.36           0.14
 All other items identified
  above                        0.03         (0.06)          0.08          (0.11)
                        ------------  ------------   ------------  -------------
Non-GAAP diluted
  earnings per share      $    0.37      $   0.22       $   1.00      $    0.78
                        ==========================   ===========================

Weighted average shares
 used in calculating
 Non-GAAP diluted net
 earnings per share (4)     114,581       113,342        113,382        112,250


(3)  Reflects the tax effect of non-GAAP adjustments above, as well as the
     effect of one-time tax benefits due to the favorable resolution of tax
     audits in the amount of $6.1 million in the third quarter of 2006 and $7.7
     million and $12.1 million in the fourth quarter and full year of 2005,
     respectively.
(4)  Weighted average shares used in calculating non-GAAP diluted earnings per
     share for the fourth quarter and fiscal year 2005 includes 1.1 million and
     0.3 million additional shares related to outstanding stock options assumed
     to be repurchased under SFAS 123(R) that would not be assumed to be
     repurchased under APB No. 25.







                        PARAMETRIC TECHNOLOGY CORPORATION
                 UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS
                                 (in thousands)


                                          September 30,         September 30,
                                               2006                  2005
                                      -----------------------------------------

ASSETS

Cash and cash equivalents                  $   183,448           $   204,423
Accounts receivable, net                       181,008               147,497
Property and equipment, net                     51,603                52,551
Goodwill and acquired intangibles, net         327,122               258,838
Other assets                                   152,263               123,314
                                      ------------------------------------------
Total assets                               $   895,444           $   786,623
                                      ==========================================

LIABILITIES AND STOCKHOLDERS' EQUITY

Deferred revenue                           $   210,997           $   200,467
Other liabilities                              244,019               262,312
Stockholders' equity                           440,428               323,844
                                      ------------------------------------------
Total liabilities and stockholders'
  equity                                   $   895,444           $   786,623
                                      ==========================================









                        PARAMETRIC TECHNOLOGY CORPORATION
            UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)


                            Three Months Ended              Year Ended
                        --------------------------------------------------------
                        September 30, September 30,  September 30, September 30,
                            2006          2005           2006          2005
                        --------------------------------------------------------

Cash flows from operating
 activities:
  Net income            $    28,052    $   17,275     $   63,195    $    83,592
  Stock-based
   compensation              11,214        15,211         40,487         15,465
  Depreciation and
   amortization               9,078         7,570         33,887         25,881
  In-process research
   and development                -           730          2,100            730
  Other                     (36,541)      (32,092)       (74,505)         2,471
                        --------------------------------------------------------
Net cash provided by
 operating activities(5)      11,803         8,694         65,164       128,139

Capital expenditures         (6,407)       (3,401)       (19,472)       (16,135)
Acquisitions of businesses        -      (192,087)       (75,084)      (198,897)
Other investing and
 financing activities         3,712       (10,493)         6,544         (2,018)
Foreign exchange impact
 on cash                        447        (1,298)         1,873         (1,553)
                        --------------------------------------------------------

Net change in cash and
 cash equivalents             9,555      (198,585)       (20,975)       (90,464)
Cash and cash equivalents,
 beginning of period        173,893       403,008        204,423        294,887
                        --------------------------------------------------------
Cash and cash equivalents,
 end of period            $ 183,448    $  204,423     $  183,448    $   204,423
                        ========================================================

 (5) Net cash provided by operating activities for the year ended September 30,
     2006 includes a tax payment of $9.5 million in relation to the settlement
     of IRS tax audits. For the year ended September 30, 2005, net cash provided
     by operating activities includes a tax refund received during the first
     quarter of 2005 of $39.5 million. This refund was included in income taxes
     receivable on the Consolidated Balance Sheet at September 30, 2004.